Add 28/90 and 49/80
28/90 + 49/80 is 133/144.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
28/90 = 28 × 8/90 × 8 = 224/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
49/80 = 49 × 9/80 × 9 = 441/720 - Add the two like fractions:
224/720 + 441/720 = 224 + 441/720 = 665/720 - 665/720 simplified gives 133/144
- So, 28/90 + 49/80 = 133/144
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90+49/80 28/90+98/80 84/90+49/80